[sex] n [ME, fr. L sexus] (14c) 1: either of the two major forms of individuals that occur in many species and that are distinguished respectively as female or male
2: the sum of the structural, functional, and behavioral characteristics of living things that are involved in reproduction by two interacting parents and that distinguish males and females 3 a: sexually motivated phenomena or behavior b: sexual intercourse
4: genitalia
[2]sex vt (1884) 1: to identify the sex of "~ chicks"
2. a: to increase the sexual appeal of--often used with up b: to arouse the sexual desires of